Accurate modeling of DNA conformational flexibility by a multivariate Ising model

Korbinian Liebl, Martin Zacharias

Publikation: Beitrag in FachzeitschriftArtikelBegutachtung

21 Zitate (Scopus)

Abstract

The sequence-dependent structure and deformability of DNA play a major role for binding of proteins and regulation of gene expression. So far, most efforts to model DNA flexibility are based on unimodal harmonic stiffness models at base-pair resolution. However, multimodal behavior due to distinct conformational substates also contributes significantly to the conformational flexibility of DNA. Moreover, these local substates are correlated to their nearest-neighbor substates. A description for DNA elasticity which includes both multimodality and nearest-neighbor coupling has remained a challenge, which we solve by combining our multivariate harmonic approximation with an Ising model for the substates. In a series of applications to DNA fluctuations and protein-DNA complexes, we demonstrate substantial improvements over the unimodal stiffness model. Furthermore, our multivariate Ising model reveals a mechanical destabilization for adenine (A)-tracts to undergo nucleosome formation. Our approach offers a wide range of applications to determine sequence-dependent deformation energies of DNA and to investigate indirect readout contributions to protein-DNA recognition.

OriginalspracheEnglisch
Aufsatznummere2021263118
FachzeitschriftProceedings of the National Academy of Sciences of the United States of America
Jahrgang118
Ausgabenummer15
DOIs
PublikationsstatusVeröffentlicht - 13 Apr. 2021
Extern publiziertJa

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